67 lines
1.4 KiB
Go
67 lines
1.4 KiB
Go
//go:build linux || darwin || freebsd || openbsd
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/* SPDX-License-Identifier: MIT
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*
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* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
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*/
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package ipc
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import (
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"errors"
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"fmt"
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"net"
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"os"
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"golang.org/x/sys/unix"
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)
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const (
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IpcErrorIO = -int64(unix.EIO)
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IpcErrorProtocol = -int64(unix.EPROTO)
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IpcErrorInvalid = -int64(unix.EINVAL)
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IpcErrorPortInUse = -int64(unix.EADDRINUSE)
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IpcErrorUnknown = -55 // ENOANO
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)
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// socketDirectory is variable because it is modified by a linker
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// flag in wireguard-android.
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var socketDirectory = "/var/run/wireguard"
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func sockPath(iface string) string {
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return fmt.Sprintf("%s/%s.sock", socketDirectory, iface)
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}
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func UAPIOpen(name string) (*os.File, error) {
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if err := os.MkdirAll(socketDirectory, 0o755); err != nil {
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return nil, err
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}
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socketPath := sockPath(name)
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addr, err := net.ResolveUnixAddr("unix", socketPath)
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if err != nil {
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return nil, err
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}
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oldUmask := unix.Umask(0o077)
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defer unix.Umask(oldUmask)
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listener, err := net.ListenUnix("unix", addr)
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if err == nil {
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return listener.File()
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}
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// Test socket, if not in use cleanup and try again.
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if _, err := net.Dial("unix", socketPath); err == nil {
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return nil, errors.New("unix socket in use")
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}
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if err := os.Remove(socketPath); err != nil {
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return nil, err
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}
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listener, err = net.ListenUnix("unix", addr)
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if err != nil {
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return nil, err
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}
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return listener.File()
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}
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